Signal discrimination apparatus, a method for discriminating a signal, and a signal transmitting apparatus for voiceband signals

A signal discrimination apparatus comprising:

• a signal discriminating part for inputting an input signal, identifying the input signal to be one of "speech" and "data", and outputting a result of the identifying as a discrimination state;
• a first detecting part for detecting whether the input signal includes a first tone, and outputting first tone detection information;
• a second detecting part for detecting whether the input signal includes a second tone, and outputting second tone detection information;
• and
• a reset signal generating part for outputting a reset signal to the signal discriminating part based on the first tone detection information and the second tone detection information;
• wherein, based on the reset signal, the signal discriminating part firstly resets the discrimination state to "speech" and secondly sets the discrimination state to "data".

A signal transmitting apparatus for voiceband signals comprising:

• a signal discriminating part for inputting an input signal, identifying the input signal to be one of "speech" and "data", and outputting a result of the identifying as a discrimination state;
• a detecting part for detecting whether the input signal includes a specific tone, and outputting a detection result as tone detection information;
• a reset signal generating part for outputting a reset signal to the signal discriminating part based on at least the detection result output from the detecting part;
• and
• a facsimile signal demodulating part for demodulating a facsimile signal when the input signal is a facsimile signal;
• wherein at least one of tone detection information detected by the detecting part and signal discrimination information is transmitted to an opposite side apparatus and received from the opposite side apparatus,
• wherein, based on tone detection information and at least one piece of information from the opposite side apparatus, the signal discriminating part firstly resets the discrimination state to "speech" and secondly sets the discrimination state to "data", and
• wherein operation of the facsimile signal demodulating part is controlled based on the discrimination state output from the signal discriminating part.

A signal transmitting apparatus for voiceband signals comprising:

• a signal discriminating part for inputting an input signal, identifying the input signal to be one of "speech" and "data", and outputting a result of the identifying as a discrimination state;
• a first detecting part for detecting whether the input signal includes a first tone, and outputting first tone detection information;
• a second detecting part for detecting whether the input signal includes a second tone, and outputting second tone detection information;
• a reset signal generating part for outputting a reset signal to the signal discriminating part based on at least one of the first tone detection information and the second tone detection information;
• and
• a facsimile signal demodulating part for demodulating a facsimile signal when of the input signal is a facsimile signal;
• wherein at least one of first tone detection information output from the first detecting part, second tone detection information output from the second detecting part and signal discrimination information output from the signal discriminating part is transmitted to an opposite side apparatus and received from the opposite side apparatus,
• wherein, based on first tone detection information from the first detecting part, second tone detection information from the second detecting part, and at least one piece of information from the opposite side apparatus, the signal discriminating part firstly resets the discrimination state to "speech" and secondly sets the discrimination state to "data", and
• wherein operation of the facsimile signal demodulating part is controlled based on the discrimination state output from the signal discriminating part.

A signal transmitting apparatus for voiceband signals comprising:

• a signal discriminating part for inputting an input signal, identifying the input signal to be one of "speech" and "data", and outputting a result of the identifying as a discrimination state;
• a first detecting part for detecting whether the input signal includes a first tone, and outputting first tone detection information;
• a second detecting part for detecting whether the input signal includes a second tone, and outputting second tone detection information;
• a reset signal generating part for outputting a reset signal to the signal discriminating part based on the first tone detection information and the second tone detection information;
• and
• a facsimile signal demodulating part for demodulating a facsimile signal when the input signal is a facsimile signal;
• wherein when the first detecting part detects the first tone, the signal discriminating part firstly resets the discrimination state to "speech" and secondly sets the discrimination state to "data", and when the second detecting part detects the second tone, the signal discriminating part firstly resets the discrimination state to "speech" and secondly sets the discrimination state to "data", and
• wherein operation of the facsimile signal demodulating part is controlled based on the discrimination state output from the signal discriminating part.

A method for discriminating a signal comprising the steps of:

• inputting a voiceband signal as an input signal;
• discriminating the input signal to be one of "speech" and "data";
• detecting a specific frequency tone in the input signal;
• discriminating the input signal to be "speech", regardless of a result of the step of discriminating the input signal to be one of "speech" and "data", when the specific frequency tone is detected in the input signal;
• setting a timer to an initial value when the specific frequency tone is detected in the input signal;
• and
• discriminating the input signal to be "data" when a specific time has passed after the timer is set to the initial value.

A method for discriminating a signal comprising the steps of:

• inputting a voiceband signal as an input signal;
• discriminating the input signal to be one of "speech" and "data";
• detecting a specific frequency tone in the input signal;
• discriminating the input signal to be "speech", regardless of a result of the step of discriminating the input signal to be one of "speech" and "data", when the specific frequency tone is detected in the input signal;
• setting a timer to a first initial value when the specific frequency tone is detected in the input signal;
• outputting tone detection information to an opposite side apparatus when the specific frequency tone is detected in the input signal;
• discriminating the input signal to be "speech" when tone detection information is received from the opposite side apparatus;
• setting the timer to a second initial value which is one of equivalent to the first initial value and different from the first initial value, when tone detection information is received from the opposite side apparatus;
• and
• discriminating the input signal to be "data" when a specific time has passed after the timer is set to one of the first initial value and the second initial value.

A method for discriminating a signal comprising the steps of:

• inputting a voiceband signal as an input signal;
• discriminating the input signal to be one of "speech" and "data";
• detecting a specific frequency tone in the input signal;
• discriminating the input signal to be "speech", regardless of a result of the step of discriminating the input signal to be one of "speech" and "data", when the specific frequency tone is detected in the input signal;
• setting a first timer to a first initial value when the specific frequency tone is detected in the input signal;
• discriminating the input signal to be "data" when a specific time has passed after the first timer is set to the first initial value;
• outputting information of a discrimination state change to "data" from "speech" to an opposite side apparatus when a discrimination state change to "data" from "speech" is detected;
• discriminating the input signal to be "speech" when information of a discrimination state change to "data" from "speech" is received from the opposite side apparatus;
• setting a second timer to a second initial value which is one of equivalent to the first initial value and different from the first initial value, when information of a discrimination state change to "data" from "speech" is received from the opposite side apparatus;
• and
• discriminating the input signal to be "data" when a specific time has passed after the second timer is set to the second initial value.